在ActiveModelSerializer渲染的has_many有條件

Question

我有以下串行：

class V1::CategorySerializer < ActiveModel::Serializer 
    has_one :category_name, :class_name => 'V1::CategoryName' 
    has_many :brands, :class_name => 'V1::Brand' 
end 

class V1::CategoryNameSerializer < ActiveModel::Serializer 
    attributes :name 
    has_many :brand_names, :class_name => 'V1::BrandName' 
end 

class V1::BrandSerializer < ActiveModel::Serializer 
    has_one :brand_name, :class_name => 'V1::BrandName' 
end 

class V1::BrandNameSerializer < ActiveModel::Serializer 
    attributes :name 
end 

當我通過render json: seller.categories類別渲染我不希望打印的品牌名稱做。輸出應該是這樣的：的

{ 
    "seller_id": 1, 
    "categories" : 
    [ 
    { 
    "name" : "Washing Machines", 
    "brands" : ["LG", "Samsung"] 
    } 
    ] 
} 

代替

{ 
    "brands_categories": [ 
     { 
      "category_name": { 
       "name": "Washing Machines", 
       "brand_names": [ 
        { 
         "name": "LG" 
        }, 
        { 
         "name": "Samsung" 
        } 
       ] 
      }, 
      "brands": [ 
       { 
        "brand_name": { 
         "name": "LG" 
        } 
       }, 
       { 
        "brand_name": { 
         "name": "Samsung" 
        } 
       } 
      ] 
     } 
    ] 
} 

另外，我想保持打印render json: V1::CategoryName.all，因爲它是當前的行爲。

Answer 1

我通過改變解決了我的問題CategorySerializer到

class V1::CategorySerializer < ActiveModel::Serializer 
    attributes :category, :brands 

    def category 
    object.category_name.name 
    end 

    def brands 
    brand_names = [] 
    object.brands.each do |brand| 
     brand_names << brand.brand_name[:name] 
    end 
    brand_names 
    end 
end